Stone-polishing wheel.



PATBNTED JULY 18, 1905.-

R. G. GEORGE. STONE POLISHING WHEEL.

'- APPLIOATION FILED NOV. 5, 1902. RENEWED JAN. 30.1005.

Patented July 18, 1905.

PATENT OFFICE.-

ROSWELL O. GEORGE, OF BARRE, VERMONT.

STONE-POLISHING WHEEL.

SPECIFICATION forming part of Letters Patent No. 794,974, dated July 18, 1905. Application filed November 5, 1902. Renewed January 30, 1905- Serial No. 243,266.

To all whom it may concern:

Be it known that I, ROSWELL O. GEORGE, a citizen of the United States, residing at Barre, in the county of Washington and State of Vermont, have invented certain new and useful Improvements in Stone-Polishing Wheels, of which the following is a specification.

My invention is in the nature of an improved polishing-wheel for the'purpose of reducing the rough face of a slab or block of stone, slate, or similar material to a smooth surface.

The said invention consists in the construction and combination of parts hereinafter more particularly set forth and claimed.

Figure 1 is a plan or top view of the polishing-wheel. Fig. 2 is an edge view of the same shown applied to a stone which is being polished. Fig. 3 is an inverted plan or underneath view of the polishing-wheel. A and A designate, respectively, the two scrolls, which start from opposite points of the open center of the wheel and are wound about each other, as shown, leaving between them a continuous scroll-form interval and ending at opposite points of the exterior of the disk or wheel. These scrolls are held in place by a diametric cross-bar B on the upper side of the wheel, the said cross-bar consisting of two sections attached, respectively, to the scrolls and having lugs Z Z'on their inner ends. These lugs are perforated to permit the passage of a fastening-bolt C. These lugs also afford a seat for the lower end of the pendent drivingshaft by which the said wheel is rotated, and the said bolt or one of the lugs Z may be screwtapped to engage its screw-threads O. Said lugs are drawn toward each other by a bolt t, which may also serve to hold the lower end of the said shaft.

In making use of this invention there is applied to the surface of the stone to be polished a quantity of emery, sand, or other scouring material, through the agency of which the rotating wheel scours and dresses off the irregular surfaces of the stone. The polishing-wheel revolves with the outer point of the scroll in the lead, and this causes the emery or sand to be drawn toward the center sufliciently to prevent the sand from being thrown out from under the wheel from centrifugal action, thus avoiding the wasting of the sand.

The object in constructing a polishing-wheel without a top or frame plate is to permit replenishing the emery or sand through the wheel by shoveling it onto the top of the latter.

The outer points of the scrolls X X are attached to the alternate scroll, making a perfectly-round wheel on its upper side, enabling it to polish up. to asquare shoulder in the stone or up to the side board of the bed holding the block of stone that is being polished. It also polishes the entire diameter of the wheel and to the outer edge of the stone that is being polished, which cannot be accomplished by a polishing-wheel when the spiral scrolls are attached to the lower side of a top plate.

A polishing-wheel constructed according to my invention is easily operated and cleaned, avoiding the danger of particles of the coarser scouring material clinging to the Wheel and becoming dislodged when using a finer scouring material and making scratches on the polished surface of the stone.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

A polishing-wheel consisting of two scrolls A A wound on each other and having similarly-arranged continuous scrolled openings between them, said openings being uncovered and permitting the passage of abrading material through the wheel at all points thereof,

the outer end of each scroll also fitting on the exterior of the other to provide a smooth periphery and an abrading-face scrolled to said periphery substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ROSWELL O. GEORGE. 

